US20090204146A1 - Method for Soft Tissue Attachment - Google Patents

Abstract

An apparatus and method for fixing a selected graft relative to a selected anatomical portion. An anchor may be provided that may be interconnected with a selected graft portion that is operable to pass through a selected bore and then moved into an operable position to engage a selected portion of the bore to substantially eliminate the possibility of the graft moving in an unselected direction through the bore. In addition, a spacer member may be used to expand a selected portion of the graft to reduce localized stress and may increase ingrowth into a selected bony portion.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS
• This application is a divisional of U.S. patent application Ser. No. 10/864,900, filed on Jun. 9, 2004. The entire disclosure of the above application is incorporated herein by reference.
FIELD
• The present application relates generally to orthopedic procedures; and relates particularly to orthopedic procedures for interconnecting soft tissue to a bony portion of an anatomy.
BACKGROUND
• In an anatomy, such as a human anatomy, various soft tissue portions are interconnected with various bony portions. For example, a tendon may interconnect a selected muscle group with a selected portion of the anatomy. Similarly, a ligament may interconnect two bony portions. For example, the anterior cruciate ligament interconnects a portion of the tibia with a portion of the femur. Although the natural and healthy anatomy generally is able to support the various portions of the anatomy with the natural ligaments and tendons, and other selected soft tissues, injury, age, or other circumstances may cause the weakening or breaking of various soft tissue portions.
• For example, a strain, other injury, or disease may weaken various soft tissue portions, such as the anterior cruciate ligament (ACL). The breaking or weakening of the tissue may require the tissue to be reconnected or replaced with various autografts or xenografts that may be made of natural or synthetic materials. These various materials are generally interconnected with selected portions of the anatomy using screws or other similar friction or obstruction holding devices.
• Though various procedures and instruments may allow for interconnection of soft tissue with selected bony portions, it may be desirable to perform a procedure substantially percutaneously or through a small incision or in less time. Generally, the screws or the obstruction devices must be driven into the selected bony portion to hold the selected soft tissue in the appropriate location. The procedure must be planned and executed in a particular manner to insure that appropriate fixation of the soft tissue to the selected bony portion. Therefore, it may be desirable to provide an instrument and method that allows for a substantially quick implantation or connection of a selected soft tissue graft or soft tissue portion to a selected bony portion.
SUMMARY
• A device for connecting or holding a soft tissue graft relative to a selected anatomicat portion such as a bone portion. An anchor may be provided that is operably interconnected with a selected portion of the graft and the anchor may anchor the connection portion to the selected bony portion. For example, the anchor portion may be passed through a bore and manipulated to hold the soft tissue graft relative to the bore by providing an interference fit with a portion of the bone next to or relative to the bore. The anchor may be formed as substantially a single piece or may be an assembly of a plurality of pieces, such that the anchor may pass through the bore and may be manipulated to interfere with passing in an opposite direction through the bore again.
• In addition, a portion of the instrument or fixation device may include a spreading or spacer portion that may hold apart selected portions of a selected graft during an implant procedure and after the implantation has occurred. The spacer may allow a reduction of a local stress on a selected implant after implantation and may ease implanting of the implant. In addition, a spacer may allow for proper positioning of various portions of the implant during the procedure and insure that the implant is kept at a proper spacing after implantation. Moreover, a spacer may assist in allowing for natural adhesion to selected portions of the anatomy.
• According to various embodiments a single piece anchor member to selectively anchor a graft relative to a selected portion of an anatomy includes a lever arm extending along a first axis between a first end and a second end. The lever arm includes a connection region extending from the lever arm and an activation region defined by the lever arm. The lever arm is selectable between an activated position and a non-activated position with the activation region. The activated position selectively holds the graft relative to the selected portion of the anatomy.
• According to various embodiments a method of fixing a graft in a selected region of an anatomy with an anchor member includes forming a bore in the selected region of the anatomy thereby defining an interior surface within the bore and an exterior surface outside of the bore. The graft may be associated with the anchor member and passed with the anchor member through a selected portion of the bore to a first position in a first orientation. The anchor member may be moved to a second position thereby selectively engaging the exterior surface.
• According to various embodiments a graft implant kit to interconnect a graft and a selected portion of an anatomy is disclosed. The kit includes an anchor selectable between an activated position and a non-activated position. An anchor passing member extending from the anchor to move the anchor between the activated position and the non-activated position. A spacer may extend from the anchor member. The spacer lays between selected portions of the graft to decrease a local stress in the graft.
• Further areas of applicability will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and various embodiments are intended for purposes of illustration only and are not intended to limit the scope of the teachings.
BRIEF DESCRIPTION OF THE DRAWINGS
• The present description and appended claims will become more fully understood from the detailed description and the accompanying drawings, wherein:
• FIG. 1A is a side plan view of an anchor according to various embodiments;
• FIG. 1B is a perspective view of an anchor according to various embodiments;
• FIG. 2A is a top perspective view of an anchor according to various embodiments;
• FIG. 2B is a top perspective view of an anchor according to various embodiments;
• FIG. 3A is an exploded view of an anchor according to various embodiments;
• FIG. 3B is an assembled view of the anchor ofFIG. 3A in an activated position;
• FIG. 3C is an elevational view of the anchor ofFIG. 3A in an activated position;
• FIG. 4A is an anchor assembly according to various embodiments in an unactivated position;
• FIG. 4B is the anchor ofFIG. 4A in a partially activated position;
• FIG. 4C is the anchor ofFIG. 4A in an activated position;
• FIG. 5A is a perspective view of an anchor according to various embodiments;
• FIG. 5B is a perspective of an anchor according to various embodiments;
• FIG. 6A is a perspective view of an anchor according to various embodiments;
• FIG. 6B is a perspective view of an anchor according to various embodiments
• FIG. 7A-7C are top perspective views of spacers according to various embodiments;
• FIG. 8 is a top perspective view of an integrated spacer according to various embodiments;
• FIG. 8A is a detailed cross-sectional view of a mold to form the spacer;
• FIG. 9 is an cross-sectional view of a femur exemplary illustrating a soft tissue anchor according to various embodiments in an unimplanted position;
• FIG. 10 is a cross-sectional view of a femur exemplary illustrating the soft tissue anchor according to various embodiments in an partially implanted orientation; and
• FIG. 11 is a soft tissue anchor according to various embodiments in a substantially implanted position including a spacer.
DETAILED DESCRIPTION OF VARIOUS EMBODIMENTS
• The following description of various embodiments is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. Although the following description may relate to providing a soft tissue anchor relative to a femur, such as for an anterior cruciate ligament (ACL) fixation, the various apparati and methods may be used for a plurality of procedures. For example, the various instruments may be used to affix or hold a hamstring, Achilles tendon allograft, other soft tissue, or any other appropriate portion. In addition, although various embodiments may be illustrated to be interconnected with a selected graft using a flexible strand, such as a suture, it will be understood that a graft may be affixed directly to an implant member. Therefore, it will be understood that the following description is merely exemplary of various embodiments and is not intended to be limiting.
• With reference toFIG. 1A, ananchor20 may be provided. Theanchor20, according to various embodiments, may be used to anchor any appropriate portion such as a soft tissue, suture, or the like. Theanchor20 may include a first flange orportion22 extending in a first direction and a second flange orportion24 extending in a second direction. Thefirst flange22 and thesecond flange24 generally interconnect to form a lever orarm portion26 of theanchor20. Thearm portion26, as described further herein, may be maneuvered to engage a selected portion of an anatomy to hold a selected graft or portion relative to the anatomy.
• Extending from thearm portion26 is a holding or engagingportion28. The engagingportion28 may be positioned relative to thearm portion26 in any appropriate manner. For example, thefirst flange22 may have a length that is greater than thesecond flange24, therefore, the softtissue anchor portion28 may be formed closer to a selected end than another selected end of theanchor20.
• The engagingportion28 may also include a fixation area orportion30. Thefixation portion30 may be a bore or passage provided through the softtissue anchor portion28. Thepassage30 may allow a selected portion of a soft tissue graft, or any other appropriate implant to pass through. Alternatively, a suture orstrand portion32, such as a loop, a plurality of loops, or a link may pass through thepassage30 to engage theanchor20 and interconnect the soft tissue graft or portion. Therefore, thesuture loop32 that may be a substantially continuous suture loop, may be provided through thepassage30.
• Thelever arm26 of theanchor20 may also be formed in any appropriate manner. For example, thelever arm26 may extend substantially along a selected axis A and be substantially planar. Alternatively, thelever arm26 may extend along any appropriate radius to define a substantially curved lever arm portion. It will be understood, therefore, that thelever arm portion26 may be formed in any appropriate manner for selected applications.
• An engagement oractivation area34 may extend from a portion of thefirst flange22 or thesecond flange24. The activation area may include apassageway36 that may be formed in the portion of thesecond flange24. An activation or passing member, such as asuture portion38, may also pass through the activation bore36 to assist in positioning theanchor20. Thesuture portion38 will be understood to be any appropriate portion, such as any appropriate flexible strand suture portion, or may also include a rigid member to interconnect with the activation portion of theanchor20. Nevertheless, thesuture portion38 may be passed through a selected portion of anatomy to move theanchor20 through the selected portion of the anatomy, as described in detail herein. It will also be understood that thesuture portion38 may not be necessary and theanchor20 may include a portion that may act as a portion to pull theanchor20 through a selected portion of the anatomy. For example, a generally integrally formed portion may extend from theanchor20 and near theactivation region30 that may or may not be frangible and may be detached from theanchor20 at a selected time. Therefore, thesuture portion38 may not be necessary and may be omitted in lieu of providing another portion that may add to move theanchor20 in a selected fashion.
• With reference toFIG. 1B, ananchor37, according to various embodiments, is illustrated. Theanchor37 may be similar to theanchor20 and similar numerals are used to reference similar portions. For example, theanchor37 may include afirst flange portion39 that includes at least a first dimension X greater than a dimension Y of thesecond flange24. As discussed above, thefirst flange39 and thesecond flange portion24 may define a lever orarm portion26. Defining at least a portion of thelever arm portion26 is thefixation portion30. Thefixation portion30 may include a dimension that at least is partly defined by thelever arm26. Although a portion of thefixation portion30 may extend beyond thearm26, thearm26 may define at least a portion of thefixation portion30. In addition, an activation portion or bore36 may be defined by a portion of thearm26, such as a portion of thesecond flange24. As discussed above, anactivation member38 may be provided to activate theanchor37 at an appropriate time.
• With reference toFIG. 2A, ananchor40 according to various embodiments may be provided that generally includes a planar body orportion42. Formed through thebody42 may be a soft tissue anchor portion that may include afirst bore44 and asecond bore46. The soft tissue graft or a selected portion, such as asuture loop32, may be provided through thebores44,46 to engage a selected soft tissue portion. In addition, theanchor40 may include aactivation region48 that may include a activation bore50, similar to the activation bore36 of theanchor20. Similarly, thesuture38 or other appropriate portion may extend through the activation bore50 to assist in passing theanchor40 through a selected portion and manipulating theanchor40 in a selected manner. Therefore, theanchor40 may be provided, such that it will pass through a selected portion of the anatomy, as described further herein, and manipulated with thesuture loop38 to assist in fixing a selected soft tissue graft with theanchor40.
• With reference toFIG. 2B, ananchor60 may be provided including a substantiallyarcuate body portion62 that extends along an arc B of any selected radius. Similar to theanchor40, theanchor60 may include a soft tissue attachment portion, including afirst bore64 and asecond bore66. The suture strand orloop32 may pass through thebores64,66 to engage a portion of soft tissue or a portion of soft tissue may engage thebore64,66. Nevertheless, theanchor60 may be used to fix a selected portion of soft tissue relative to a portion of anatomy, or any other appropriate purpose.
• Theanchor60 may also include aactivation region68 that may define a activation bore70, similar to thebore50 of theanchor40. Again, similar to theanchor40, thesuture loop38 may be passed through thebore70 to be used to manipulate theanchor60 in a selected manner during a procedure. Nevertheless, according to various embodiments, a portion may extend from theanchor60 that is not necessarily included as asuture loop38. Therefore, it will be understood that providing thesuture loop38 is merely exemplary.
• Further, it will be understood that an anchor need not be formed as a single member. In addition to being formed as a single member, the anchor may be formed to include any appropriate geometry, shape, size, or the like. Therefore, the anchor need not include simply straight or curved portions or include a portion that extends from a portion of the anchor to engage the implant, but may be formed in any appropriate manner. It will be understood that the anchor may be passed through a selected portion of the anatomy in a first manner or condition and then manipulated to a second manner or position to assist in positioning the anchor in a selected position to perform the necessary tasks.
• With reference toFIGS. 3A-3C, ananchor80 according to various embodiments is illustrated. Theanchor80 may include a first flange orportion82 extending in a first direction and second flange orportion84 extending in a second direction from acentral region86. Thearms82 and84 define a activation portion ormember88 of theanchor80 as discussed herein. Thelever arm portion88 may be maneuvered, as discussed herein, to engage a selected portion of anatomy to hold a graft or other portion relative to a selected portion of the anatomy.
• Formed in thesecond arm portion84 is a activation bore90 through which theactivation suture38 may be passed. As described herein, theactivation suture38 may be used to position theanchor80 in a selected position and manipulate or maneuver the anchor from an unactivated to an activated position, thereby allowing thelever arm portion88 to abut a selected portion of the anatomy and hold theanchor80 in a selected position.
• Defined near the fulcrum orcentral area86 is an engagingportion92. The engagingportion92 may engage a graft engaging member orportion94. Thegraft engaging portion94 may be formed of a selected material, as described herein. The engagingregion92 may include afirst bore96 and asecond bore98. Thebores96,98 may engage selected portions of thegraft engaging section94 such asfirst region100 and asecond region102.
• Thegraft engaging member94 generally defines a substantially U orcurved portion104 from which extends a first extendingportion106 and a second extendingportion108. The first extendingportion106 extends to the first engagingmember102 while the secondengaging portion108 extends to the first engagingportion100. Each of the engagingportions100,102 may engage a selected one of thebore96,98.
• With particular reference toFIG. 3B, in an activated or neutral position, theanchor80 includes thelever arm88 at a generally perpendicular position relative to thegraft engaging portion94. Thegraft engaging portion94 may define an axis C that is generally perpendicular to an axis D of thelever arm88. Therefore, in the neutral or unactivated position, thelever arm88 does not position or apply a substantial amount of stress to thegraft engaging portion94. As illustrated, a firstengaging portion100 and a secondengaging portion102 are passed through or engage a selected one of thebores96,98. In this way, thelever arm88 is interconnected with thegraft engaging portion94 by both of the engagingportions100,102 of thegraft engaging portion94.
• With particular reference toFIG. 3C, in an activated position, theactivation suture38 may apply a force to thelever arm88 such that thelever arm88 may be positioned or moved to an angle relative to thegraft engaging portion94. The axis D of the lever arm is generally positioned at an angle having an internal angle of less than 90° relative to the axis C of the graft engaging portion. In this way, a distance or width defined by theanchor80 is less than the length of thelever88 to allow for theanchor80 to be passed through a selected portion of the anatomy.
• Thegraft engaging member94 may be formed of any selected material that may be moved from a first position to a second position and allowed to regain its first position or orientation substantially after the removal of a selected force. For example, thegraft engaging member94 may be formed of a wire of a selected material, such as a shape memory material including the material known as NITINOL™. It will be understood, however, that a shape memory material may be any appropriate material that may include a first shape, be deformed to a second, and substantially re-obtain the first shape. Therefore, shape memory materials may include, but are not limited to, metals, metal alloys, polymers, strands, natural and synthetic materials, or the like. The shape memory material may include a first selected shape or orientation which is generally maintained by the material and may be returned to or maintained by the material after deforming the material to a second shape or orientation.
• As illustrated inFIG. 3C, theactivation arm88 may disorientate or move thegraft engaging portion94 into a second portion while thegraft engaging portion94 may re-obtain its first orientation, just as that illustrated inFIG. 3B, after theactivation arm88 has been released. Therefore, the graft, as discussed herein, may be held relative to a selected portion of the anatomy with theanchor80 without substantially binding the graft in thegraft engaging portion94. Thegraft engaging portion94 may be any appropriate substance such as a wire, plastic thread, filament, suture, or the like.
• With reference toFIGS. 4A-4C, ananchor120 according to various embodiments is illustrated. Theanchor120 may include an activation orlever portion122 that generally includes afirst arm portion124 and asecond arm portion126. Defined in either the first or second arm portion, and illustrated in thefirst arm portion124, is anactivation bore128 that may be formed in any appropriate orientation through either of thefirst arm position124 or thesecond arm position126. The activation bore128 may be interconnected with theactivation suture38. Alternatively, theactivation suture38 may be positioned relative to any portion of theanchor120. For example, theactivation suture38 may be interconnected with asleeve130 that substantially surrounds thelever arm120. Thelever portion122 generally includes a central axle or rotation area about which thefirst arm124 and thesecond arm126 may rotate.
• With particular reference toFIG. 4B, and described further herein, thefirst arm124 may rotate about theaxle area132 relative to thesecond arm126. This may allow thelever arm portion122 to be moved from an unactivated to an activated position and allow it to selectively engage a selected portion of the anatomy. Theaxle portion132 may be formed in any appropriate manner. For example, a portion of thefirst arm124 may extend into a portion of thesecond arm126 yet be substantially movable relative thereto. Therefore, thearm portions124,126 define an integral axial portion thereby not requiring a separate axle member. Nevertheless, it will be understood that an axle member may be provided in both the first arm and thesecond arm124,126 so that thearms124,126 may rotate relative to the axle portion to allow for movement of thefirst arm124 relative to thesecond arm126.
• Nevertheless, a bore oropening134 may be provided between thefirst arm124 and thesecond arm126 generally near theaxle region132 to allow for the passing of asuture136 or similar apparatus. Thesuture136 may allow a graft to be engaged by theanchor120 to be held by the anchor in a selected position.
• During insertion of theanchor120, theactivation member122 and thesuture loops136 may be positioned within a sleeve ortube130. It will be understood that thesleeve130 is not necessary to position theanchor120 but might be provided for various reasons such as positioning the graft, positioning the anchor and other appropriate reasons relative to the selected portions of the anatomy.
• Nevertheless, as theanchor120 is passed through a selected portion of the anatomy, thesleeve130 may be stopped according to appropriate means in a selected area. Therefore, as illustrated inFIG. 4B, as thelever portion122 is moved between an unactivated and an activated position, thelever122 is substantially removed from thesleeve130. This allows thefirst arm124 to move relative to thesecond arm member126 and vice versa while being substantially free of the obstruction of thesleeve130. Nevertheless, also during moving theanchor120 into a selected position, thesleeve130 may assist in holding thearm portions124,126 of thelever portion122 in a selected orientation.
• With reference toFIG. 4C, once theanchor120 including thelever arm122 are positioned in a selected orientation, thelever portion122 is in a substantially activated position such that thefirst arm124 is substantially aligned and in a single axis with asecond lever arm126. As discussed above, this may be performed by substantially rotating about acentral axle area130, thefirst arm124 relative to thesecond arm126 and vice versa. Thesuture portion136 extends from thelever portion122 and may be positioned within thesleeve130. Agraft140 that may be positioned over thesuture member136 may also extend through a portion of thesleeve130 for positioning thegraft140 in a selected orientation. This allows theanchor120 to be positioned in a selected portion of the anatomy and manipulated from the unactivated position to the activated position, particularly shown inFIG. 4C.
• With reference toFIG. 5A, ananchor150, according to various embodiments, may include aactivation portion152 that includes afirst arm portion154 and asecond arm portion156. Defined in a selected arm portion, such as thesecond arm portion156, may be aactivation bore158. As discussed above, an appropriate member, such as theactivation suture38, may be passed through the activation bore158 to move the activation orlever section152 from a first position or unactivated position to an activated position. Thelever arm152 defines a central orfulcrum region160 that includes abore162. Further, anextension member164 may be interconnected with thebore162 or thefulcrum region160 with a selectedsuture member166.
• Asuture member166 may pass through a first or central bore164A defined in a selected region of theextension member164 and through a second set ofbores164band again through a third set ofbores164c. Therefore, thesuture member166 may define a substantially figure “8”portion166athat includes a first portion of the figure “8”166athat substantially interconnects thelever arm152 with theextension member164. A second section of thesuture portion166bmay be used to engage a selected graft portion for positioning relative to a selected portion of the anatomy. As discussed herein, thelever arm152 may be moved to a selected portion of the anatomy in an unactivated position and moved to the activated position, substantially illustrated inFIG. 5A, to engage a selected portion of the anatomy. The first section of thesuture portion166aallows for thelever arm152 to move relative to theextension member164 and the graft extending from the second portion of thesuture166b.
• With reference toFIG. 5B, ananchor portion170 includes alever portion152 substantially similar to thelever portion152 illustrated inFIG. 5A, and will not be described in great detail here. Nevertheless, anextension member172 extends from thelever arm portion152 and is interconnected therewith with asuture portion174. The suture portion defines substantially a continuous loop that includes a portion that extends through a bore defined in theextension member172 and the fulcrum bore defined by thelever arm152. A second section of the suture174B extends and may engage a selected graft for implantation. As discussed above, a activation suture or portion may be used to pass theanchor170 through a selected portion of the anatomy and used to move thelever arm152 from an inactivated to an activated position. Thesuture174 may be positioned in a groove ordetent176 to substantially limit an abrasion between thesuture174 and a portion of the anatomy.
• With reference toFIG. 6A, ananchor assembly180 according to various embodiments is illustrated. Theanchor assembly180 may include thelever arm152 substantially similar to thelever arm152 discussed above. Asuture member182 may be provided to interconnect thelever arm152 with a spacer orextension member184. Theextension member184 may define abore186 that allows thesuture182 to pass through and engage thebore164 defined by thelever portion152.
• A selected graft may be passed through an opening orpassage188 defined by theextension spacer member184 and allowed to drape through theopening188 and over aspacer portion190 of theextender spacer184. Thespacer portion190 may be provided in any appropriate size, dimension, geometry, or the like. For example, as illustrated in phantom inFIG. 6A, thespacer portion190′ may extend a distance beyond a dimension of thespacer member184 otherwise defined by the portion including theopening188. It will be understood that thespacer portion190 may also be provided in any appropriate geometry to interact with theanchor152 or a portion, such as a soft tissue portion, passed through theopening188. Therefore, as discussed herein, stress on a particular area of the graft may be reduced and thespacer190 may be used to position the graft adjacent a selected portion of the anatomy. Nevertheless, theinterconnection suture182 between thelever portion152 and theextension spacer184 may allow for thelever arm182 to be moved relative to theextension spacer portion184 such as with a activation suture or portion.
• With reference toFIG. 6B, ananchor196, according to various embodiments, is illustrated. Theanchor assembly196 may include thelever portion152, as discussed above. Theanchor assembly196 also includes aspacer extender portion198 that may be interconnected with thelever portion152 using aconnection suture200 or other appropriate mechanisms. Theextender portion198 includes a first arm198A and a second arm198B that may extend around a selected portion, such as the central orfulcrum region160 of thelever portion152 to allow theattachment suture200 to interconnect thelever portion152 and thespacer portion198. Theconnection suture200 may form a substantially continuous loop that passes through a plurality of bores defined by thespacer extender portion198 to interconnect thelever portion152 and thespacer portion198.
• Defined between thelever portion152 and thespacer portion198 is an opening orpassage202. Thepassage202 may allow for positioning of a graft relative to theanchor assembly196. The graft may drape through theopening202 and be held in a relative position with thespacer portion204 of thespacer extension portion198. As discussed above and herein, the spacer portion may allow for positioning the graft in a selected position and substantially reducing a localized stress on the graft assembly.
• As discussed above, thespacer extension portion198 may include thespacer portion204 formed in any appropriate shape, size, geometry, or the like. Therefore, as exemplary illustrated, thespacer portion204 may be substantially cruciform in shape. The cruciform shape may extend and define a portion of theopening202 or may extend only a portion of the length of thespacer portion204. Therefore, it will be understood that thespacer portion204 may be any appropriate shape, size, geometry, or other appropriate condition based upon selected parameters.
• With reference toFIG. 7A, a spacer orseparator220 is illustrated. Thespacer220 may be interconnected with theanchor20, or any appropriate anchor or mechanism, with a connection loop or portion222. Thespacer220 includes aspacer body224 that may define a plurality of sections to assist in separating and spacing a portion of a soft tissue graft. For example, the body may define a plurality of ridges226A,226B,226C, and226D. The various ridges assist in holding portions of ligament implants, or other appropriate implants, apart for a selected period of time. For example, a plurality of strands of a soft tissue or graft, such as a ligament L, may be looped through the connectingsuture32 and allowed to pass over a portion of thespacer220. The ligament L, which may also include any other appropriate soft tissue portion, may be provided over thespacer220 to assist in implantation of the soft tissue. Each of the ridges226A-226D assist in separating various portions of an implant and also define a major or exterior diameter of thespacer220. Therefore, thespacer220 may be used to hold an implant in an implanted position and also may assist in healing after the implantation. Nevertheless, thespacer220 may be implanted with theanchor20 in cooperation with theanchor20 to assist in implanting a selected tissue portion.
• With reference toFIG. 7B, aspacer230 according to various embodiments is illustrated. Thespacer230 includes abody portion232 which may include or have extending therefrom ananchor attachment portion234. Theanchor attachment portion234 may interconnect with theanchor20, or any appropriate anchor portion, to assist in cooperating with a soft tissue implant to assist in implantation of the implant. As with thespacer220, the soft tissue implant may be laid over thebody portion232 to assist in holding the soft tissue in a selected implant area and assist in healing after the implantation. It will be understood that thebody portion232 may be formed in any appropriate shape, geometry, size, and other proportions. For example, thebody portion232 may include a geometry or shape to assist in holding the soft tissue relative to a selected region of thebody232 and the implant area.
• The attachment region222 of thespacer220 and234 of thespacer230 may be formed in any appropriate manner. Similarly, thebody224 of thespacer220 and thebody232 of thespacer230 may be formed of any appropriate material. For example, the body may be formed of a polymer, metal, or any appropriate biocompatible material. Therefore, the tissue attachment or theattachment region222 and234 may be formed of any appropriate material that may interconnect with the material of thebody224 and232 in an appropriate manner. For example, theattachment area222 or234 may be formed of a flexible strand or suture material that may be molded into thebody region224 and232 of therespective spacers220 and230. Alternatively, theattachment portions232 and234 may be any other appropriate portion that may be interconnected with thebody portions234 and232 of therespective anchors220 and230. Therefore, theattachment portion222 and234 may be welded or otherwise affixed to thebody portions224 and232.
• With reference toFIG. 7C, aspacer240 is illustrated. Thespacer240 may include abody portion242 from which extends anattachment region244. Thebody portion242 may be formed in any appropriate shape or size, but may be formed as a substantially cylindrical portion extending along an axis G. Thebody portion242 may also define acentral cannula246 which extends along the length of thebody portion242 and also substantially along the axis G. The cannula or any other region may be provided for selected purposes, such as allowing for passage of a guide wire or the like.
• Theattachment region244 may be affixed to thebody region242 and interconnected therewith in any appropriate manner. For example, the attachment region may be substantially rigid and be formed in generally integrally or as one piece with thebody region242. Therefore, thespacer240 may be formed a single piece, such as with molding or casting of various materials. Moreover, thespacer240 may be formed of any appropriate material such as a ceramic, polymer, metal, metal alloy or combinations thereof. Theattachment region244 allows for attachment of thespacer240 to a selected member such as theanchor20. Therefore, theanchor20 may be interconnected with thespacer240 for assisting in fixation of a selected soft tissue portion. In addition, thebody region242 may define external grooves or recesses248 that may extend along a length of thebody region242. Selected portions, such as portions of an implant or a suture member, may be fitted into or engage thegroove248 for positioning thespacer240 or for fixation of thespacer240.
• With reference toFIG. 8, aspacer assembly250 is illustrated. Thespacer assembly250 includes a block portion orbody252 that may be formed around a selectedgraft254. Thegraft254 may be any appropriate implant portion such as a tendon or a ligament replacement. Thegraft254 portion may define a substantially unitary strand or member that may be formed in theblock252 and interconnected with the connection strand orsuture32 or any other appropriate mechanism. Thegraft254 may be looped through thebody252 to form agraft loop256 at an end of thebody252 opposite the ends of the trailing strand ends of thegraft254.
• Although thegraft254 may be formed into thebody252 in any appropriate manner, thegraft254 may be formed into thebody252 by molding a selected moldable material, such as polymer, that may include a bone cement or bio-absorbable polymer, or other materials such as a bone mulch and the like. With reference toFIG. 8A, thegraft254 may be positioned in a selectedmold258. Themold258 may be formed in any appropriate manner and include an internal geometry or shape defined by a wall of themold258 to form the selectedbody252. Themold258 may define aport260 that allows access to an interior of themold258 so that the moldable material may be passed into the interior of themold258 to be cured or set up. In this way, thegraft254 may be positioned in the mold andattachment suture32 or other appropriate portion be interconnected with thegraft254.
• After thegraft254 is positioned in themold258, the moldable material may be inlet into themold258 and allow to cure around thegraft254. Themold258 may then be appropriately removed from the area to allow interconnection of thegraft254 with a selected portion such as theanchor20. It will be understood that any appropriate material may be injected into themold258 or poured into the mold through any appropriate access port. Also, themold258 may be provided either during a procedure or may be preformed depending upon the selected procedure. In addition, themold258 may be substantially customized such that a selected area may be appropriately filled with thebody252. Nevertheless, thebody252 may be substantially customized or selectively formed for various procedures to allow for a substantially custom fit for assuring an appropriate positioning of thespacer body252.
• An exemplary method of performing a procedure using theanchor20 and thespacer220 is illustrated. It will be understood that although theanchor20 and thespacer220 are described as an exemplary way of performing a method of using an anchor or spacer, it will be understood that any appropriate anchor or spacer may be used. In addition, theanchor20, or any appropriate anchor, may be used alone and not with thespacer220, or any appropriate spacer. Likewise, thespacer220, or any appropriate spacer, may be used with any appropriate portion and not with theanchor20 or any other appropriate anchor. Therefore, it will be understood that the following method described and illustrated as merely exemplary of a method of performing a selected procedure and is not intended to limit the procedure.
• With initial reference toFIG. 9, a procedure may be performed relative to afemur270 of an anatomy. For example, abore272, also known asfemoral bore272, may be formed through a portion of the femur. Although the following description relates generally to the replacement of an anterior curiciate ligament (ACL), it will be understood that the various methods and the instruments may be used for any appropriate procedure in an ACL replacement or reconstruction is merely exemplary. In addition, it will be understood that the ACL graft is generally interconnected with the tibial portion, not particularly illustrated, but generally known in the art. Likewise, thefemoral bore272 may be formed using any appropriate instruments, such as drill or reamer. These are generally known in the art and not described in detail herein.
• Nevertheless, once thebore272 is formed, or at any other time appropriate to the procedure, theanchor20 may be positioned to be moved through thebore272. Theanchor20 interconnected with theactivation suture38 may also be interconnected with agraft portion274. Thegraft portion274 may be any appropriate graft portion, such as an allograft or zenograft, that may either be natural or synthetic materials. In addition, theattachment suture32 is generally provided through theeyelet30 of theanchor20. Thesuture32 may include a plurality of loops that may be formed from a single strand or a plurality of strands. Nevertheless, theattachment suture32 may include a plurality of strands of a suture material for various reasons, such as reduced creep and stretching of the suture to further insure appropriate positioning of thegraft274. Thegraft274 may be interconnected with theanchor20 in any appropriate manner. For example, thegraft274 may also be passed simply through theeyelet30 rather than being interconnected with theattachment suture32. Thegraft274 may be interconnected with theanchor20 prior to a procedure or inneroperatively. Similarly, theactivation suture38 may be interconnected with theanchor20 at any appropriate time.
• Nevertheless, once thebore272 is formed through thefemur270, the activation suture may be passed through thebore272. Theactivation suture38 may be passed through thebore272 in any appropriate manner. For example, a guide wire may be used to assist in forming thebore272 which may be interconnected with a end of theactivation suture38 to assist in passing theactivation suture38 through thebore272 of thefemur270. Once theactivation suture38 is passed through thebore272, theactivation suture38 may be used to assist in passing theanchor20 through thefemoral bore272.
• Theactivation suture38 is interconnected with theactivation portion24 of theactivation lever26 of theanchor20. Therefore, manipulating theactivation suture38 may assist in moving theanchor20 through thefemoral bore272. Theactivation suture38 may be used to urge theanchor20 into any appropriate position in thefemoral bore272 or through thefemoral bore20.
• With reference toFIG. 10, theanchor20 may be passed through a substantial portion of thefemoral bore272. Theanchor20 may be passed any appropriate distance through thefemoral bore272, such as a distance great enough to allow theactivation lever26 to be operated. For example, theanchor20 may be passed a distance through thefemoral bore272 such that a majority of theactivation lever26 is free of thebore272.
• Once theactivation lever26 can be activated, theactivation suture38 may be used to activate theactivation lever26. In activating theactivation lever26, theactivation lever26 is operably moved to an activated position by rotating it a selected distance relative to thefemur270. Shown particularly in phantom inFIG. 10, theactivation lever26 may be moved a distance such that a portion of it extends beyond the edges of thebore272. This allows theactivation lever26 to engage a selected portion of thefemur270 after theactivation lever26 has been activated.
• With reference toFIGS. 10 and 11, once theactivation lever26 has been activated, thegraft274 may be used to set theanchor20 in position. Theanchor20 may be pulled adjacent to a portion of thefemur270 such that theactivation lever26 is operable to engage a surface280 of thefemur270. In this way, theactivation lever26 engages thefemur270 such as theanchor20 is not able to substantially move a distance through thebore272 after theactivation lever26 has engaged the surface280 of thefemur270. In this way, thegraft274 may be held within thebore272 at a selected position due to the interconnection with theanchor20. Theactivation lever26 engages thefemur270 to reduce or substantially eliminate the possibility of theanchor20 moving back through thefemoral tunnel272.
• According to various embodiments, such as theanchor20 and thespacer220 illustrated atFIG. 7A, may also engage thegraft274 that is positioned in thefemoral tunnel272. Thespacer220 interconnects with theconnection suture32 through theconnection22. Thegraft274 may be looped through theconnection suture32 and over thespacer220. Thespacer220 may fill a portion of thebore272 such that thegraft274 may not be allowed to substantially bind on theconnection suture32. For example, thespacer220 forces apart or holds apart the portions of thegraft274 such that the pressure on thegraft274 may be spread over a greater area rather than at a very small area next to theconnection suture32.
• In addition, thespacer220 may assist in positioning thegraft274 near the wall of thefemoral tunnel272. This may assist in ingrowth of natural tissue into thegraft274 to assist in fixation of thegraft274 in thefemoral tunnel272. In addition, thespacer220 may be sized to substantially engage a portion of thefemoral tunnel272 such that the bone may grow into thespacer220. In this way, thespacer220 may also assist in fixing thegraft274 to a selected position in thefemoral tunnel272. In addition, thespacer220 may be interconnected with theanchor20, or any appropriate anchor or assembly according to various embodiments, to at least initially hold thegraft274 at a selected position.
• Therefore, it will be understood that any appropriate spacer, such as thespacer220 may be used with any appropriate anchor, such as theanchor20, to assist in connecting thegraft274 in thefemoral tunnel272. In addition, thespacer220 may assist in allowing a long term interconnection of thegraft274 with thefemoral tunnel272 while theanchor20 may provide the substantially initial and temporary fixation of thegraft274 relative to thefemoral tunnel272. Alternatively, all portions of the connection may be substantially permanent such that thegraft274 may be mechanically fixed relative to thefemoral bore272.
• Therefore, it will be understood that the anchor may pass through a portion of a bore, such as thefemoral bore172, to allow for holding a selected soft tissue, such as anACL graft174, relative to a selected portion. Although theACL graft174 may be fixed relative to thefemoral bore172, it will be understood that any appropriate soft tissue portion may be fixed or held relative to a selected portion with an appropriate anchor. Simply providing the ACL graft is exemplary of various procedures and implants.
• The description of the invention is merely exemplary in nature and, thus, variations that do not depart from the gist of the invention are intended to be within the scope of the invention. Such variations are not to be regarded as a departure from the spirit and scope of the invention.

Claims (18)

1. A method of fixing a graft in a selected region of an anatomy with an anchor member, comprising:

forming a bore in the selected region of the anatomy thereby defining an interior surface within the bore and an exterior surface outside of the bore;

interconnecting a flexible member with a connection region extending from the anchor member;

associating the graft with the flexible member;

passing the anchor member through a selected portion of the bore to a first position in a first orientation;

moving the anchor member to a second position thereby selectively engaging the exterior surface; and

holding the graft in a selected position.

2. The method ofclaim 1, further comprising:

moving an activation portion defined by the anchor;

wherein moving the anchor member to a second position includes moving the lever arm to selectively engaging the exterior surface

3. The method ofclaim 2, wherein the activation portion and the anchor member are integrally formed as a single member.

4. The method ofclaim 1, wherein the flexible member includes forming a plurality of loops of a strand through an anchor portion of the anchor member; and

interconnecting the graft with the plurality of loops of the strand.

5. The method ofclaim 1, further comprising:

interconnecting an activation member with the anchor member;

passing the activation member through the bore; and

moving the anchor member through the bore with the activation member.

6. The method ofclaim 5, further comprising:

pulling the activation member to move the anchor member to a second position thereby selectively engaging the exterior surface.

7. The method ofclaim 1, further comprising:

passing a spacer through a selected portion of the bore relative to the anchor member.

8. The method ofclaim 7, further comprising:

connecting the spacer to the flexible member;

wherein passing the anchor member also passes the spacer through the bore.

9. The method ofclaim 8, further comprising:

positioning the graft about a portion of the spacer, such that the graft is held relative to the spacer as the spacer is passed through the bore.

10. The method ofclaim 1, further comprising:

engaging a portion of the bore with a spacer.

11. The method ofclaim 1, further comprising:

interconnecting a spacer with the anchor member; and

separating a portion of the graft with the spacer.

12. The method ofclaim 11, wherein interconnecting a spacer member includes a spacer member having a cross-section defined by at least one of cruciform, a circle, a square, an ellipsoid, or combinations thereof.

13. The method ofclaim 11, wherein interconnecting a spacer with the anchor member includes:

passing a flexible member through at least a portion of the anchor member and a portion of the spacer member such that said anchor member is operable to move relative to said spacer member about said flexible member.

14. The method ofclaim 11, wherein separating a portion of the graft with the spacer includes substantially forming the spacer member around a portion of the graft to hold at least a first portion of the graft from a second portion of the graft.

15. The method ofclaim 11, wherein separating a portion of the graft with the spacer includes passing at least a portion of the graft through the spacer such that the spacer substantially holds a first portion of the graft a distance from a second portion of the draft.

16. The method ofclaim 1, wherein interconnecting a flexible member with the anchor member includes interconnecting a suture, a wire, a shape memory material, and combinations thereof with the anchor member.

17. The method ofclaim 1, wherein interconnecting a flexible member with the anchor member includes interconnecting a shaped memory material with the anchor member;

wherein passing the anchor member through a selected portion of the bore includes moving the shape memory material to a stressed position to pass the shaped memory material through the bore;

moving the anchor member to a second orientation to substantially de-stress the shape memory material to return it to an unstressed state.

18. The method ofclaim 1, wherein associating the graft with a flexible member includes substantially associating a graft to replace an anterior cruciate ligament with the flexible member;

wherein holding the graft in a selected position includes holding the ACL graft relative to at least a portion of the femur.

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